Windows 10 has been available for a few weeks now, but the more cautious among us like to wait to see which bugs are likely to cause trouble. As a Mac user, I haven’t been watching the wider picture too carefully, but I can give you an update on the known issues that could affect your Lightroom use.
Officially, “the latest versions of all Creative Cloud applications are compatible with Windows 10” and they have “found no significant issues with running Creative Cloud products with Windows 10.” (This includes the perpetual license for Lightroom 6 too.)
Good news! But that doesn’t mean the upgrade will be completely smooth sailing, as there are interactions with drivers and changes in file permissions that can still cause a few hiccups. The main Lightroom-related issues are:
Graphics drivers – buggy video drivers are causing all sorts of problems including crashes, hangs and sluggish behavior. The AMD/ATI 15.2 driver (which is included in AMD Catalyst™ 15.7.1) is the biggest culprit at this point in time, and will require the manufacturer to issue an updated driver. (Update September 2015 – AMD now have a beta driver available which fixes this issue.)
In many cases, going to Lightroom’s Preferences > Performance tab and unchecking Enable Graphics Processor solves the problem, however if it’s crashing on startup, you won’t be able to access the Preferences dialog. In this case, you can edit the preferences manually, using these instructions.
Some people have reported that going to the AMD Catalyst Control center > Gaming > 3D Application Settings tab > Frame Rate Control and changing a couple of the settings solves the problem, even with the checkbox enabled in Lightroom. To test the theory yourself, change Wait For Vertical Refresh to Always On, and change OpenGL Triple Buffering to On.
File permissions – when you try to open Lightroom after upgrading, it may say “Unexpected error opening catalog. The catalog could not be opened due to an unexpected error”. Don’t panic! There’s an official Adobe tech note with a solution here: https://helpx.adobe.com/lightroom/kb/error—unexpected-error-opening-catalog–occurs-in-lightroom-af.html
Incorrect colors – in many cases, the upgrade appears to be selecting the wrong monitor profile, which can result in Lightroom displaying the photos incorrectly. To fix it, recalibrate your monitor.
MSVCR110.dll – if Lightroom complains that MSVCR110.dll is missing, try the instructions in this tech note: https://helpx.adobe.com/creative-cloud/kb/error-opening-applications-in-windows-10.html
Older versions of Lightroom are not officially tested, but I haven’t seen any additional reports of problems, other than the issues listed above.
If you run into any other problems, report them at the Official Feature Request/Bug Report Forum